2178205016 has 16 divisors (see below), whose sum is σ = 4398298800. Its totient is φ = 1005325344.

The previous prime is 2178204979. The next prime is 2178205021. The reversal of 2178205016 is 6105028712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10472036 + ... + 10472243.

It is an arithmetic number, because the mean of its divisors is an integer number (274893675).

Almost surely, 2^2178205016 is an apocalyptic number.

2178205016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2178205016 is an abundant number, since it is smaller than the sum of its proper divisors (2220093784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2178205016 is a wasteful number, since it uses less digits than its factorization.

2178205016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20944298 (or 20944294 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 2178205016 is about 46671.2439945626. The cubic root of 2178205016 is about 1296.2822808253.

The spelling of 2178205016 in words is "two billion, one hundred seventy-eight million, two hundred five thousand, sixteen".